Research on Microstructures Transformation Laws and Fractures Mechanisms of Low Carbon Silicon-Manganese TRIP Steels
The microstructures transformation laws and fractures mechanisms of low carbon silicon-manganese TRIP steels in simple tension state were researched by using TEM and SEM. The finals show that the microstructures before deformation of TRIP steels include ferrite,bainite and retained austenite,and the part retained austenites were transformed into martensites with twining structure at the condition of tensile strain. The plastic deformation firstly occur in ferrites,and then the glide bands and micro-pores appear,the micro-pores gradually evolution into micro-cracks,the retained austenites in the grain boundaries of ferrites were transformed,the stresses were relaxed and the fractures were delayed,so the higher plasticity of TRIP steels were gained.
TRIP steel retained austenite microstructures fracture mechanism
Yan Ling Liu Rendong Guo Jinyu Wang Keqiang Sun Jianlun Meng Bei
Asteel Company Limited Technology Center,Anshan 114001,China Ansteel Company Limited Technology Center,Anshan 114001,China
国际会议
2009 International Symposium on Automobile Steel(2009年汽车用钢生产及应用技术国际研讨会)
大连
英文
283-287
2009-09-06（万方平台首次上网日期，不代表论文的发表时间）